1-) C# -  bilgisayarın adını almak username

1-)bilgisayarın adını almak username// RamBo\Ramazan -->NetworkName\Username

            string userName = System.Security.Principal.WindowsIdentity.GetCurrent().Name;

            Console.WriteLine(userName);

2-)bilgisayarın  mac adresini almak

add->referances kısmından System.Management u ekle

    public String macadresal()

        {

            ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");

            ManagementObjectCollection moc = mc.GetInstances();

            string MACAddress = String.Empty;

            foreach (ManagementObject mo in moc)

            {

                if (MACAddress == String.Empty) // only return MAC Address from first card

                {

                    if ((bool)mo["IPEnabled"] == true) MACAddress = mo["MacAddress"].ToString();

                }

                mo.Dispose();

            }

            MACAddress = MACAddress.Replace(":", "");

            return MACAddress;

        }

3-)bilgisayarın  ip  adresini almak

    public static string GetIP4Address()

        {

            string IP4Address = String.Empty;

            foreach (IPAddress IPA in Dns.GetHostAddresses(Dns.GetHostName()))

            {

                if (IPA.AddressFamily == AddressFamily.InterNetwork)

                {

                    IP4Address = IPA.ToString();

                    break;

                }

            }

            return IP4Address;

        }